So far, I've found this (bite proof long gloves)
If I can't find something better, I could cut something like this and strap them around her legs and ankles using elastic and Velcro.
https://www.amazon.co.jp/gp/aw/d/B077RZ3T8W/ref=mp_s_a_1_24?__mk_ja_JP=カタカナ&qid=1521569215&sr= 8-24&pi=AC_SX236_SY340_QL65&keywords=ヘビ+保護&dpPl=1&dp ID=51%2BOSXapldL&ref=plSrch